Concrete-form.



O.H.HAGA CONCRETE FORM.

APPLICATION FILED MAY 19, 1911.

1,042,9 1 0. Patented Oct. 29, 1912.

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0; H. HAGA.

CONCRETE FORM.

- APPLICATION FILED MAY 19, l 91l.' 1,042,910. 1 Patented 0ct.29,1 912.

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COLUMBIA PLANOGRAPH 20., WASHINGTON, D c..

G. H. HAGA.

CONCRETE FORM. APPLICATION FILED MAY l9, 1911,

' Patented 0013. 29, 1912.

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UNITED STATES PATENT OFFICE.

CLAUDE H. HAGA, 0F ALEXANDRIA; VIRGINIA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO INTERSTATE REALTY & CONSTRUCTION COMPANY, OF ALEXANDRIA, VIRGINIA,

A CORPORATION OF VIRGINIA.

CONCRETE-FORM.

Specification of Letters Patent.

Patented Oct. 29, 1912.

Application filed May 19, 1911. Serial No. 628,150.

citizen of the United States, residing at Alexandria, in the county of Alexandria and State of Virginia, have invented certain new and useful Improvements in Concrete- Forms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to improvements in forms, and particularly to forms arranged in sections or plates which may be built up as occasion may require 'for molding a. wall or other structure any desired size and shape.

A further object of the invention is the arrangement in a form for walls, of metallic plates constructed with a groove alongone edge and a tongue on the opposite edge together with clamping means for holding two or more plates together when assembled.

Another object of the invention is the arrangement of a plurality of interlocking plates held together by clamps and formed so that each alternate layer of plates may be arranged offset or with what is known as a break-joint.

A still further object of the invention is the arrangement in concrete forms of clamps for holding the plates or side members together, either on a flat surface or at a corner at any desired angle.

With these and other objects in view the invention comprises certain noval constructions, combinations, and arrangement of parts as will be hereinafter more fully described and claimed.

In the accompanying drawings: Figure 1 is a top plain view of an embodiment of the invention. Fig. 2 is aside view of the structure shown in Fig. 1. Fig. 3 is a section through a wall and a number of plates embodying the invention, the same showing the arrangement of the plates when passing a joist. Fig. t is a front view of a joist plate. Fig. 5 is an enlarged detail perspective View of a clamp and surrounding parts embodying certain features of the invention. Fig. 6 is a front elevation of the structure shown in Fig. 5. Fig. 7 is a longitudinal sectional view through a clamping plate and associated parts on line 7-7 of Fig. 6. Fig. 8 is a perspective view of a corner plate. Fig. 9 is a top plan view of a pair of corner plates and a corner clamp. Fig. 10 is a side view of the structure shown in Fig. 9. Fig. 11 is a view similar to Fig. 10, except that the same shows upper and lower clamps with asingle retaining wedge.

. Fig. 12 is an enlarged side view of one of the plates embodying certain features of the invention.

In constructing a mold or wall form a plurality of plates are provided which are duplicates in order that the same may be built up as desired- The respective plates are formed with a groove on one edge and a tongue on the opposite edge so that the tongue on one plate will fit into the groove on the adjacent plate. Preferably the ends of the plates are perfectly smooth and square and are held together by a clamping arrangement which draws the plates tightly together and holds the same in that position, the tongue and groove structure assisting in causing a perfect alinement of the respective plates hen a corner is provided a slightly modified form of clamp is used for drawing the corner plates properly together and bind ing the same sufiiciently' tight to prevent the escape of concrete. The binding of the plates together by the clamping means and the arrangement of the tongue and groove prevents the escape of concrete mixture when in a liquid form, and thus provides means by which the cream or best of the concrete is utilized.

In order that the invention may be more clearly understood an embodiment of the sameis shown in the accompanying drawings in which 1 and 2 indicate side walls bound. together by bolts 3 formed with a head 4:v at one end and a plurality of apertures 5 at the opposite end. A washer 6 is fitted over the. end having apertures 5 and a cotter pin 7 is inserted through one of the apertures 5 according to the thickness of the wall desired. The walls 1 and 2 are made up of a plurality of plates ,8 which are held together by clamping. members 9. When it'is desired to form a corner a plate 10* (Fig. 8) is used or a pair of plates 8 are used provided with clamps, as shown in Figs. 9 and 10, and hereinafter fully described. In arranging the plates 8 in a wall the same may be arranged with the clamps" clamps 9 offset for breaking the joint between one layer of plates and the next succeeding and preceding layer.

The plates 8 are formed with a smooth inner surface but on the outer surface there 'is arranged a flange or reinforcing exten- I formed with beveled portions 17 and 18 in order to co-act with the beveled wedge 21 and the bevel on plate 19. By this construction the binding action of the clamp will not be decreased by the ordinary wear and tear when in operation as the bevels .of the parts will take up such wear and tear.

The wedge 21 .is arranged to fit against the beveled portion 18 and the beveled groove 22 formed in the enlarged end 23 of plate 19. Groove 22 and the beveled portion 18 are slightly tapered for more easily accommodating wedge 21. Clamping plate 19 is formed with apertures 24 and 25 which accommodate lugs 17 and 18 and are made sufliciently long to permit the easy engagement and removal of the plate 19 and also cause the strain to be exerted more freely upon the plates 8.

In addition to the arrangement of the reinforcing ribs or projections 11 the plates 8 are each formed with a groove 26 on one edge and a tongue 27 on the opposite edge so that the plates may be interlocked as clearly shown in Fig. 3 and the inner surface kept in perfect alinement. Preferably the grooves 26 on the respective plates are slightly deeper than the tongues 27 in order to positively cause a tight joint when the plates are assembled, and prevent the escape of any of the concrete even when in liquid form. In this connection it will be noted that in the mixing of concrete the best part or cream of the cement will mix firstwith the water and will also be the first to leak out any openings or joints in the mold or form. This part of the cement contains the highest element of the binding agent and is the first to leak out or pass through any cracks or other openings in the form, so thar. the arrangement of the'forms having plates provided with tongues and grooves with means for clamping the plates together is of great advantage. The leakage of this extremely valuable part of the cement is stopped so that not only a clean smooth wall is the result of the use of plates 8, but the best of the cement is retained for binding the entire body together.

oist 28.

The plates 8 are preferably made of a standard size but may be constructed in various sizes as desired. In either event the same may be used freely in building walls and permitting the insertion of oists at any desired height, as clearly shown in Fig. 3. When it is desired to insert a joist the wall is built up to the proper height and the oist placed in position after which the outside plates 8 are placed in position and a joist plate 8' placed in position so that the lower edge will rest on the joist 28. The upper edge of the joist plate 8 is formed with a groove in the usual manner for receiving one of the plates 8 in the usual manner. The lower edge of joist plate 8 is formed with a flange 29 extending at right angles to the general direction of plate 8'. The flange 29 is formed with a plurality of apertures 30 through which screws or other securing means are passed and caused to enter the The spaces between the joist 28 are blocked up by pieces of wood or other means as may be most convenient. By this arrangement there need be no readjustment of the plates 8 and yet the joist will be molded properly directly into the wall.

When it is desired to make a corner, plates 10 may be used, or corner plates 31 and 32 (Figs. 9 to 11 inclusive). Plate 32 is formed with projecting lugs 33 and 34 having beveled hook portions 35 and 36 respectively. Plate 31 is formed with lugs or projections 37 and 38 which lugs are formed with beveled enlargements 39 and 40 respectively. The plates 31 and 32 are fitted together in the usual manner and then a clamping plate 19 similar to clamping plate 19 is fitted over the lugs 33 and 34 and also over the ends of lugs 37 and 38. difference between plate 19 and plate 19 is that the slot formed therein is continuous instead of being interrupted intermediate the length thereof. After plate 19 has been placed in posit-ion the wedges 41 are inserted and driven down until the joint has been made perfectly tight. In order to use one of the plates 10, as shown in Fig. 8, on top of the corner plates 31 and 32, corner plate 31 is notched at 31 for accommodating the tongue of plate 10.

In the drawing the plates 8 have been shown perfectly fiat and straight, but it will be evident that if desired the same may be formed are shaped or other desired shape and held together by the clamps. In forming the plates 8, 8, and 10, as well as plates 31 and 32, the same are preferably formed of cast steel and then the tongues and grooves and the ends are machined for causing all of the plates to properly fit together and form tight joints in order to prevent leakage.

In arranging the bolts 3 the same are positioned centrally of the plates for not only The one holding the plates properly in place, but for acting as supports for reinforcing bars and other reinforcing members which extend horizontally. The bolts 3 being arranged centrally of the plate will, of course, space' the reinforcing members intermediate the joints of the plates 8 and at the place desired.

What I claim is:

1. A mold for walls comprising a plurality of plates formed with a smooth inner surface and an outer surface reinforced by border ribs and a transverse central rib, each of said plates being formed with an aperture extending therethrough at the central point of said central rib, clamping means for holding said plates together, and a tie bolt eX- tending through said apertures for tying each pair of plates together centrally, said reinforcing ribs distributing the strain over the entire plate.

2. A mold for walls comprising a plurality of interlocking plates, each of said plates being formed with a lug at each end, each of said lugs having a beveled face arranged on the opposite side to the edgeof the plate, a clamping plate fitting over the lugs on adjacent plates, said clamping plate being formed with a pair of apertures and a hook at one end, the aperture at the end opposite said hook being beveled for coacting with one of said lugs, and a wedge fitting-between one of said lugs and said hook for drawing said lugs toward each other and clamping said lates together.

3. A mold or walls comprising a plurality of plates including corner plates beveled portion of said last mentioned projection for drawing together and locking said plates.

1. A mold for walls comprising a plurality of plates including cornerplates, a plurality of interlocking lugs extending from,

said corner plates, each of said lugs being 'formed with a beveled face, a locking plate fitting oversaid lugsand arranged so that one of the lugs engages the locking plate near one end and the other end of the'locking plate rojects to a point adjacent the other of said lugs, and a beveled wedge engaging said locking plate and the beveled face of said last mentioned lug for drawing said lugs toward each other and for clamping said plates in a closed position.

In testimony whereof I aflix my signature in presence of two witnesses.

A CLAUDE H. HAGA. Witnesses:

Rom. T. LONG, A. L. KrroHm.

Copies of this patent may be obtained for five cents each, by addressing the commissioner of Iatents,

Washington, D. C. i 

